Short bend 90° malleable iron

  Datasheet (PDF)

Georg Fischer malleable cast iron short bend 90 degrees 1a, ISO/EN D4, provides an exceptionally robust and space-efficient directional transition for demanding industrial, commercial, and utility piping installations. Manufactured from high-grade decarburised annealed whiteheart malleable cast iron grade EN-GJMW-400-5 in accordance with Design Symbol A, the fitting delivers superior mechanical tenacity, high ductile yield, and structural shock absorption against hydraulic water hammer, system vibrations, and thermal expansion forces. Engineered with a compact short-radius curve profile, this fitting accommodates sharp ninety-degree pipeline turns within restricted plant rooms, service shafts, riser configurations, and packaged equipment skids where space constraints preclude the use of wider long-sweep bends. Jointing relies on precision-machined threads comprising a parallel internal thread (Rp) at one end and a taper external thread (R) at the opposite end conforming to EN 10226-1 and ISO 7-1, creating metallic surface compression across mating thread crests and roots for a dependable, pressure-tight seal when paired with an approved thread sealant. Corrosion protection is achieved via uniform hot-dip galvanisation utilizing high-purity zinc, creating an integrated series of iron-zinc alloy diffusion layers that permanently bond to the substrate to resist aggressive media, atmospheric oxidation, and internal degradation across drinking water networks, heating circuits, cooling water circuits, compressed air lines, and non-hazardous gas distributions. Designed to operate safely under harsh working environments, the component maintains a maximum permissible operating pressure rating of 25 bar across temperatures from -20 to 120 degrees Celsius and 20 bar up to 300 degrees Celsius, while strict adherence to standard z-dimension geometries allows precise center-to-face planning, streamlined pre-assembly, and rapid installation.